Collapsible insulating casing



Aug. 17, 1943. P. ZALKIND 2,326,817

COLLAPSIBLE INSULATING CAS ING Original Filed April 20. 1936 Fig: 2mvENTQk ,7 I I y ATTORNEYS hollow Walls.

Patented Aug. 17, 1943 UNITED 1 coLLAPSmLEINSULATIN CASING f 7 PhilipZalkind, New York, N. Y. 'Griginal application April 20, 1936, SerialN0.- 75,315. Divided and this application. August I 17, 1929,Serial-No.-290,582 5 a 1 v tonne," (01, 2213-14) My inventionis adivision of my application Serial No. 75,315, filed April 20', 1936, nowmatured intoiPatent No. 2,173,871 and relates to novelheat insulatedcontainers, and more particularly-re lates to folding or collapsiblecontainers.

My invention comprises a container formed fromrblanks of sheet material;such as corrugated board, box board and the like, cut, [scored andfolded in a manner to provide a casinglhaving These hollow walls providedead air spaces which effectively insulate the containeragainst thepassage'of heat. Thus, with my construction alcontainer is providedwhich maybe folded or collapsed, and at'thesame'time isan efiicient,heat insulator. Sucha container may be used for the storage of. eitherhot orcold 'm'odification' the outer casing. comprises a plainrectangular tube which may be made from an integral.rectanguliar'blankof slieet'material hav- "ing parallel score lines which divide the blankinto the four side wall membersof the tube, such V as members 8%, 8!, 82and 83 ofFigure ,1. The

materials, whichare' to be maintained either hot.

' or cold as the case may be. 1Thus my container is particularly adaptedtothe shipment of icecream and the like, but I do not limit its use tothis particular'purpose. My container;v is inexpensive to construct. Itmay be: stored inknock down conditionfand maybe so delivered to theuser. It therefore requires comparatively little spacefor storing-andcost oidelivery will be. relatively low. Moreover, where additionalheatinsulation is required, my container is adapted'to receive fillermembers which provide such additional heat insulation; These members maybe" of any well known type, but where such 'a'dditional insulation isnecessary, I prefer to use one of the types of insulating fillerdisclosed in my copending applications Serial Nos; 75,314, now.

matured into Patent N0. 2,231,982,"and75,316.

H The objects of my invention are thus-to provide a container that maybe collapsed or folded, that Hi3 and l gand lill and-108,, Extendingfrom provides insulation against the passage of heat, that is,inexpensive to construct, and that is adapted to receive an insulatinfiller. There are other objects of my inventionwhlich will be ap'parentirom the following detailed description in a connection with thedrawing, in which Figure 'I is aperspective view, partly cut, away.showing a modified form of my novel container. v Figure 2 is a developedview of a blank for forming the inner shell shown in Figuregl.

ofFi'gure 2in 'a'collapsed condition.

Figure 3 is aperspective view showing the shell tube is preferablyformedbylunitin'g the outside edges of the blank by-mean's of tapeprovided'with an adhesive coating which overlaps both. of the end panelsof the blank. Howevenan additional flap may be? provided for making alap joint; or

the tube may be joined on the face'ot'a' side member rather than at acorner ofthe tube.

, A suitable blankror the inner shell is shown in FigureQ; Theblankshown in this figure comprises'four side walls 9| to 94,eachSepai-ated'by .av series of parallel score-lines; as; for example,

95 951 and 97;.thus providingtwo-narrow panels, as, for, instance,"99andjliltl extending between each'twoma'in panels. When the bl'ankisassembled the two'narro-w panels of each paiiwlie in ,face .to facerelationship with each other and maybe united with each other inasuitable man- 1.1181, as'," for "instance; by theuselof an adhesive,substance. Each-pair ofnarrow panels so united I ,forms a spacingmember,

'shown'jin Figures 1, 3'andi4, g -I Protrudingirom each of the side wallsections atthe top and bottom thereof areend wall clo which is 7 clearly.sure sectionsllll and I02, separated from theirv individualside-wallyseetions. by the score lines the end Wall s'ectionsfil amissare the tabs His iformed'is shown in'FigureB, V

Figure 4 is a'perspective viewshowingthe inner shell of Figures 2 and 3assembled for insertion,

into the outer shell as shown in Figure 1.

Figure 5 is a developed view of a blank for forming the cover shown inFigure 1.

Referring now to Figures 1 to 5, I have shown a referred embodiment ofmy invention. In this fabove,-the end lseotions l5] are'turnedabouttheir score lines! as and me until" the narrow sections we betweenthe-score "lines 1 es and" m are in face to face r'ela-tierisi-iip"withtheir cor To assemble th'e shell from the collapsed tube,

. the side walls '51! and "94 .are'turned on their-score lines"untilnthezside'walls are inproper angular I relationship to eachother... Fora rectangular 1' casing;- of course, eachwall shouldbe ataright engle to its adjoining wall. 7 When the tube has been-expandedinto proper position, asde'scr-ib'ed respondingside Wallsections ill-94.Thersecsections I02 are then folded to be perpendicular to the sidewalls. The narrow panels I09,in conjunction with the top edge of theirrespective side walls, form a peripheral outstanding flange at the topedge of the shell, as is clearly shown in Figure 4, which shows anexpanded and assembled inner shell as viewed from the top. A

similar peripheral flange is formed by the panels I III at the bottom ofthe shell.

To complete the insulated casing the inner shell is placed within theouter shell, as is shown in Figure 1, the space flanges'98 at-thecorners of the inner shell fitting snugly'within inner corners of theouter shell. Pan shapedclosures III are then applied to the upper andlower end of the outer casing.

A blank for such a suitable end closure is shown in Figure 5. Itcomprises merely a main section H2 with four side flaps as at H3 andseparated from the main section by the score lines 90. The member I I Iformed by bending the flaps I I3 on the score lines 90 is proportionedto fit snugly within the outer shell of the casing. It can be seen thatthis casing maybe easily assembled and may be easily recollapsed forreshipment after use.

When the shell is assembled as described above, six separated deadair'spaces are provided for insulating 'the' container. Thus, a singleside wall panel of the inner shell,the two spacing members'QBat eachside of the:panel, the'corresponding side wall of the outer shell, and asection of each of the pan-shaped closure member form a dead airspaceisolated from the other spaces between the two'shells; and each of thefour walls is thus provided with'its isolated air space. At each end ofthe container? anisolated dead air space is provided-shy the panshapedmember abutting the outstanding peripheral flange formed on the closureof the inner shell. It will be, of course,= understood that, by properlyproportioning the various flanges and panels, the thickness of the deadair space may be adjusted to any desired value depending upon theparticular application.

It will be noted that the inner casing just de scribed may be used withthe outer casingshown in my Patent 2,173,871.. In this .event, the topends of the flanges 98 may be removed, as shown in Figure 4 at 89, so asto matchthe hollow reinforcement around the top edge of thef outer.shell of Figures 1, 2 and 4"of l?atent 2,173,871.

Where this outer shell is 'used with the inner shell shown in Figure 4,the bottom end'closure on the outer shell may. be provided in the outershell blank, and the top end closure may be a hollow plug member, anddesigned to fitlwithin the outstanding flange, provided by the top 010-sure of the shell of Figure 4. It will befurther understood that variousother combinations may be used, as, for instance, the inner shell shownin Figure 4 may be used with an outer shell having a bottom end closure,as shown in Figure l and a top end closure, asshown in Figure 1.

casing.

While I have shown my casing to be rectangular in cross-section, it maybe hexagonal or 0ctagonal just as readily, by providing the propernumber of sidewall panels, and the tube so formed may be collapsed inthe same manner, as is shown in Figure3 for the rectangular tube. Thus,for a'hexagonal casing of the blank of Figure 2 will have six.main.panels, such as panels 9|, and the closure panels ml and I02 willbe hexagonal. It is not necessary to provide a closure panel, such aspanel IM or I02 for each side wall, with a rectangular casing or one ofa greater number of sides. However,

.. where a'lesser number of full flaps are provided on each end thenthere are sides to the casing. I prefer that the narrow panels, such asI09 and H0, be provided on the blank; and that on those sides where theclosure flap is omitted, the narrow panel be secured to the side panelin a suitable manner.

Where higher insulating value is required than is readily obtainablewith a single-insulating air space protecting 'anyarea of. the containeragainst transfer of heat to or from the container, I may provideadditionalheat insulating means between the inner and outer shell. In mypatent application entitled Insulation sheets, Ser. No.

'75,316 and filed April 20, 1936, I have ShOWn a non-collapsible type ofheat insulating filler; and in my application entitledcoll-apsibleifiller, Ser. No. 75,314 and also filed April 20, 1936,.nowmatured into Patent, No. 2,231,982, I have shown a collapsible type ofheat insulating filler; Either of these types of fillers are adapted tobe inserted between the inner'and outer shells of the casings which Ihave disclosed in the present application; and fillers of these typesprovide a plurality of air spaces in series to the passage of' heatperpendicular to the wall of the container. It will be understood thatmany change's'may be made in'my insulating casing, and that theparticular modifications described are shown by way of illustrationonly, and are not intended to limit my invention within themeaning ofthe appended claim. Now having describediny invention in a manner thatit may be readily, 'understood by one. skilled inthe art, I claim: Acollapsible insulating casing comprising an inner and an outer, shelland dish-shaped closure members; said outer shell comprising a collapsi-'ble tube forming the outer side walls; said inner shell comprising sidewalls, end Walls, flanges lengthwise of said side walls at the junctureof each to'adjacent side wallsfflaps for bottom and top walls,peripheral flange members of said inner shell along the top and bottomof said shell;

said lengthwise flanges on' said inner shell cooperating with said outershell at its corners to l'secure the side walls of said inner and outershells in predetermined'spaced relationship with each other, therebyforming dead air'insulating spacing covering the side walls of saidcasing; a member formed of sheet material enclos- 'ing the lower end ofsaid casing to form a dead air insulatingi space covering the bottom endof said cas ng, and asimilar member formed of sheet material enclosingthe upper open end of said casingyand thereby forming a fdead airinsulating space covering the top end of said PHILIP" ZALKIND

